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On one hand it suppresses lung cancer cell migration and metastasis, and on the other hand it has been shown to promote lung cancer survival via inducing general control nonrepressed 2 (GCN2) degradation. Another important function of Nedd4-2 is to regulate the activity of epithelial sodium channel (ENaC), a membrane channel which mediates the clearance of fluid from the alveolar space at birth or during pulmonary edema. Here, we make an outlined review for the expression and function of Nedd4-1 and Nedd4-2 in the respiratory system in hope of getting an in-depth insight into their roles in lung disorders. Doxorubicin (DOX) is an eff ;ective chemotherapeutic drug to suppress the progression of various types of tumors. However, its clinical application has been largely limited due to its potential cardiotoxicity. MicroRNAs (miRNAs) are emerged as critical regulators of cardiac injury. This study was aimed to explore the effects of irigenin (IR), as an isoflavonoid isolated from the rhizome of Belamcanda chinensis, on DOX-induced cardiotoxicity using the in vivo and in vitrostudies. The results indicated that DOX-induced fibrosis, cardiac dysfunction and injury were markedly attenuated by IR through reducing apoptosis, oxidative stress and inflammation in heart tissue samples. Importantly, DOX resulted in a remarkable decrease of miR-425 in heart tissues and cells, which was significantly rescued by IR. Receptor-interacting protein kinase 1 (RIPK1) was discovered to be a direct target of miR-425. DOX induced over-expression of RIPK1 both in vivo and in vitro, which were greatly decreased by IR. Transfection with miR-425 mimic could inhibit RIPK1 expression, whereas reducing miR-425 increased RIPK1 expression levels. In parallel to miR-425 over-expression, RIPK1 knockdown could attenuate apoptosis, reactive oxygen species (ROS) production and inflammation in HL-1 cells. However, over-expression of RIPK1 markedly abolished miR-425 mimic-induced apoptosis, ROS accumulation and inflammatory response in DOX-exposed cells. Herein, miR-425 could ameliorate cardiomyocyte injury through directly targeting RIPK1. Furthermore, activation of miR-425 by IR markedly improved DOX-induced cardiotoxicity, and therefore IR could be considered as a promising therapeutic agent for the treatment of cardiac injury. The sodium pyrophosphate (SP)-enhanced Fenton reaction has been proven to have promising potential in remediation of polychlorinated biphenyls in soils by keeping iron ions soluble at high pH and minimizing the useless decomposition of H2O2. However, little information can be obtained about the effect of environmental factors on its remediation performance. Thus, the effect of environmental factors on the degradation of 2,2',5-trichlorodiphenyl (PCB18), one of the main PCB congeners in Chinese sites, was investigated in this study. PCB18 degradation was sensitive to pH, which ranged from 39.8% to 99.5% as increased pH from 3.0 to 9.0. ·OH was responsible for PCB18 degradation at pH 5.0, while both ·OH and O2- resulted in PCB 18 degradation at pH 7.0 with the calculated reaction activation energy of 73.5 kJ mol-1. https://www.selleckchem.com/products/forskolin.html Bivalent cations and transition metal ions decreased PCB18 degradation markedly as their concentrations increased. The addition of humic acid had an inhibitory on PCB18 degradation, but no obvious inhibition of PCB18 removal was observed when the same concentration of fulvic acid was added. The addition of 1 and 10 μM model humic constituents (MHCs) promoted PCB18 degradation, but the addition of 100 μM MHCs decreased PCB18 removal. Biphenyl, two dichlorobiphenyl, and two hydroxy trichlorobiphenyl derivatives were identified as the major degradation products of PCB18 in the Fe2+/SP/H2O2 system at pH 7.0. Thus, an oxidative pathway contributed by OH and a reductive pathway induced by O2- were proposed as the main mechanisms for PCB18 degradation in the SP-enhanced Fenton reaction. Accurate assessment of particulate matter (PM) dose and respiratory deposition is essential to better understand the risks of exposure to PM and, consequently, to develop the respective risk-control strategies. In homes, this is especially relevant in regards to ultrafine particles (UFP; less then 0.1 μm) which origin in these environments is mostly due to indoor sources. Thus, this study aimed to estimate inhalation doses for different PM mass/number size fractions (i.e., PM10, PM2.5 and UFP) in indoor air of residential homes and to quantify the deposition (total, regional and lobar) in human respiratory tract for both newborn children and mothers. Indoor real-time measurements of PM10, PM2.5 and UFP were conducted in 65 residential homes situated in Oporto metropolitan area (Portugal). Inhalation doses were estimated based on the physical characteristics of individual subjects and their activity patterns. The multi-path particle dosimetry model was used to quantify age-specific depositions in human respiratory tract. The results showed that 3-month old infants exhibited 4-fold higher inhalation doses than their mothers. PM10 were primarily deposited in the head region (87%), while PM2.5 and UFP depositions mainly occurred in the pulmonary area (39% and 43%, respectively). Subject age affected the pulmonary region and the total lung deposition; higher deposition being observed among the newborns. Similarly, lower lobes (left lobe 37% and right lobe 30%) received higher PM deposition than upper and middle lobes; right lobes lung are prone to be more susceptible to respiratory problems, since asymmetric deposition was observed. Considering that PM-related diseases occur at specific sites of respiratory system, quantification of site-specific particle deposition should be predicted in order to better evidence the respective health outcomes resulting from inhaled PM. At present, there has been renewed interest in biochar research, but most of them were focused on the short-term effects of biochar and the information of long-term application of biochar is still lacking. In addition, the nutrient mechanism of biochar has rarely been the subject of research. This research explored the effect of potassium (K) nutrient and the response of bacterial communities to biochar in yellow-brown soil based on two-year experiment. In this study, we used peanut shell biochar obtained by pyrolysis at 400 °C, and at the same time, 0%, 20%, 40%, 100% conventional potassium fertilizer were used. The results indicated that the effective improvement of biochar on acidic soil was long-term and 2% biochar replaced 40% conventional potassium fertilizer. Biochar accelerated the conversion of slowly-available K to available K by changing the composition of clay minerals and promoting the growth of K-dissolving bacteria. From the perspective of bacterial community, biochar significantly increased the relative abundance of Sphingomonas, Gaiella, and Elev-16S-1332, which improved the potential ability of soil to degrade pollutants and inhibit pathogens.
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